Re: blue obsidian is ther such a thing?
I am not aware of any obsidian that is blue. There is, however, a lot of slag from smelters that is blue. I suspect that what you have is slag. I hope you didn't pay too much for it. Even so, a piece of slag can be attractive, sitting on a desk or shelf.
From Don Peck - October 12, 2007 at 11:03:48